Be prepared for a delayed reaction, too. It’s very common to be totally calm during a crisis, and then days or weeks (or years) later suddenly get hit with a tidal wave of “HOLY SHIT THAT HAPPENED.”
Sometimes your mind waits until it feels safe to start processing things emotionally. It’s a powerful survival strategy, but it can really blindside you, because just as you start to feel like things are okay, you’re overwhelmed by the realization of how not-okay things were before.
This may not happen, and that’s okay too. But it’s something to watch out for when your initial reaction is numbness.